(1S,2S,3R,4S,6S)-6-(hydroxymethyl)-4-methyl-1-(1-methylene-3-(phenylsulphonyl)propyl)cyclohexane-1,2,3-triol

(1S,3S,5S,6S)-3-((tert-butyldiphenylsilyloxy)methyl)-5-methyl-7-oxabicyclo(4.1.0)heptan-2-one

(1S,4S,6S)-6-[(tert-butyldiphenylsilyloxy)methyl]-4-methyl-1-[1-methylene-3-(phenylthio)propyl]cyclohex-2-enol

5,4''-bis-O-(tert-butyldimethylsilyl)avermectin B2a

5,4''-bis-O-(tert-butyldimethylsilyl)-23-O-(methanesulfonyl)avermectin B2a